Linear map-making with LuSEE-Night
Year: 2025
Type: preprint
Abstract: LuSEE-Night is a pathfinder radio telescope on the lunar far side employing four 3-m monopole antennas arranged as two horizontal cross pseudo-dipoles on a rotational stage and sensitive to the radio sky in the 1-50 MHz frequency band. LuSEE-Night measures the corresponding 16 correlation products as a function of frequency. While each antenna combination measures radiation coming from a large area of the sky, their aggregate information as a function of phase in the lunar cycle and rotational stage position can be deconvolved into a low-resolution map of the sky. We study this deconvolution using linear map-making based on the Wiener filter algorithm. We illustrate how systematic effects can be effectively marginalised over as contributions to the noise covariance and demonstrate this technique on beam knowledge uncertainty and gain fluctuations. With reasonable assumptions about instrument performance, we show that LuSEE-Night should be able to map the sub-50 MHz sky at a ~5-degree resolution.
Source: arXiv (Cornell University)
Authors: Camacho, Hugo, Rotermund, Kaja M., Slosar, Anže, Bale, Stuart D., Barker, David W., Burns, Jack, Bye, Christian H., Jones, Johnny Dorigo, Fahs, Adam, Goetz, Keith, Herrmann, Sven, Hibbard, Joshua J., Jeong, Oliver, Klein-Wolt, Marc, Koopmans, Léon V. E., Krajewski, Joel, Li, Zack, Louis, Corentin, Maksimović, Milan, McLean, Ryan, Monsalve, Raul A., O'Connor, Paul, Parsons, Aaron, Piat, Michel, Pulupa, Marc, Pund, Rugved, Rapetti, David, Saliwanchik, Benjamin, Speedie, Graham, Stefanov, Nikolai, Sundkvist, David, Suzuki, Aritoki, Vedantham, Harish K., Yousuf, Fatima, Zarka, Philippe
Institutions: University of Colorado Boulder, University of California, Berkeley, Lawrence Berkeley National Laboratory, University of Minnesota, Brookhaven National Laboratory, University of Groningen, Université Paris Cité, Université Paris Sciences et Lettres, Observatoire de Paris, Sorbonne Université, Laboratoire AstroParticule et Cosmologie, Space Sciences Laboratory, Stony Brook University, Netherlands Institute for Radio Astronomy, Centre National de la Recherche Scientifique
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7077911519
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